Hi
@CriticalThought
I guess I need to clarify it here that one cant simply siphon off technology from one project to another. However what is plausible is the facilities created for one project(ToT) can be effectively utilized for something else. You need to keep in mind that LCA was being designed in late 80s to almost entire 90s. The wing design and the general layout had been frozen by mid 90s and Su-30 deal was still under negotiation in 90s-- Su-30 started arriving in India only in late 90s/early 2000s.
It is not entirely true that the creation of an eco system for sub-system level components for Su-30 did not in any way helped LCA. There are various areas where the very same companies provide sub system for LCA and Su-30. Avionics, composites, landing gear, tyres, wind tunnel facilities are just some examples.
What you are not getting is, Russia(for that matter even China wont really reveal their trade secrets to Pakistan) would never reveal things like-
1) Various aerodynamic coefficients ranging from stability, damping and control derivatives for their flanker. These derivatives are inherently linked to the design of a digital fly by wire system. If one knows these derivatives and their variation with respect to alpha(AoA) and beta(side slip angle) one can design the flight control laws based on either gain scheduling or MRAC(model reference adaptive control). These can then be deployed onto their own on board mission computer. This is what constitutes the source code for FBW. Any new weapon that is integrated to such an aircraft requires some change in the software to accommodate for changes in CG upon the release of the weapon. I can write elaborately on this subject as I have worked on it and still do.
2) The metallurgical process associated with SCBs and some other special alloys.
3) Source code of their radar